PostgreSQL supports a variety of ways of defining parameter settings for various user groups.
For all users in database
ALTER DATABASE saas SET configuration_parameter = value1;
For a user named
simon connected to any database, use the following:
ALTER ROLE saas SET configuration_parameter = value2;
or set a parameter for a user only when connected to a specific database, as follows:
ALTER ROLE simon IN DATABASE saas SET configuration_parameter = value3;
The user won't know that these have been executed specifically for him. These are default settings, and in most cases can be overridden if the user requires non-default values.
You can set parameters for each ...